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The Effect of Atmospheric Pressure plasma Corona Discharge on pH, Lipid Content and DNA of Bacterial Cells

plasma Science and Technology 2011年第1期13卷 99-105页

作者： May KORACHI Necdet ASLAN Yeditepe University Genetics & Bio-Engineering Department Yeditepe University Physics Department

Effect of plasma corona discharges on the pH, whole cell lipids and DNA of bacteria is investigated. Results showed an increase in the acidity levels of water due to plasma reactive species which, however, were not responsible for bacterial cell death. No changes in the whole cell lipid contents were observed, while DNA after plasma treatment showed deterioration of the amplified sequences, indicating the possible occurrence of DNA degradation. In conclusion, reactive species produced by plasma discharges affects DNA, possibly contributing to cell death.

关键词： plasma sterilization pH lipids bacterial cell membrane DNA damage

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Inactivation of Escherichia Coli Using Remote Low Temperature Glow Discharge plasma

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plasma Science and Technology 2008年第5期10卷 619-622页

作者：胡淼陈杰瑢陈纯 Department of Environmental Science and Engineering Xi'an Jiaotong UniversityXi'an 710049China

Low-temperature plasma is distinguished as a developing approach for sterilization which can deal with and overcome those problems such as thermal sensitivity and destruction by heat, formation of toxic by-products, higher costs and inefficiency in performances, caused by conventional methods. In this study, an experimental investigation was undertaken to characterize the effects of the operational parameters, such as treating time, discharge power and gas flow rate, of remote glow discharge air plasma. The results show that the inactivation of Escherichia coli can reach above 99.99% in less than 60 seconds and the optimal operational conditions for treating time, discharge power and gas flow rate were： 40 s, 80 W and 60 cm^3/min, respectively. The contribution of UV radiation during plasma germ deactivation is very limited.

关键词： plasma sterilization remote glow discharge plasma UV radiation

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